2194492728 has 64 divisors (see below), whose sum is σ = 5759308800. Its totient is φ = 695888640.

The previous prime is 2194492691. The next prime is 2194492757. The reversal of 2194492728 is 8272944912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18900 + ... + 68892.

It is an arithmetic number, because the mean of its divisors is an integer number (89989200).

Almost surely, 2^2194492728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2194492728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2879654400).

2194492728 is an abundant number, since it is smaller than the sum of its proper divisors (3564816072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2194492728 is a wasteful number, since it uses less digits than its factorization.

2194492728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50092 (or 50088 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 2194492728 is about 46845.4130945603. The cubic root of 2194492728 is about 1299.5052807904.

The spelling of 2194492728 in words is "two billion, one hundred ninety-four million, four hundred ninety-two thousand, seven hundred twenty-eight".